[It's not an uncommon trick for a Guardian and a Ghost. When your Ghost is the only thing that can bring you back after you've suffered a fatal wound, it's far preferable to keep it close and safe, being the far more vulnerable of the pair.]

Ooh, quantum physics! Yeah, I've worked with scientists, but mostly for guard duty. But that's good to know. Erm, that it won't happen. Not that that doesn't bring up more questions and curiosities, but I'd say we have enough of the latter, and I won't pry.